enterprise linux fundamentals of red hat

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Fundamentals of Red Hat Enterprise Linux

RHEL 8: Any Cloud, Any Workload, One OSRIK MEGENSRHCE, RHCA, RHCI, RHCXTraining Solution Architect.Red Hat EMEA

MELANIE JONESUK Product DirectorGlobal Knowledge

GERARD MARLOWUK Sales DirectorGlobal Knowledge

GARY WILLIAMSBusiness Development ManagerRed Hat EMEA

MOHAMMED ZAHER Technical Learning & Development InstructorRed Hat EMEA

CONFIDENTIAL RED HAT ENTERPRISE LINUX 8

Housekeeping rules:Participants are muted upon entry and during the event

Questions can be submitted via the Q&A section

All unanswered questions are going to be addressed in the last 10 minutes of each section.

This session is going to be recorded

CONFIDENTIAL Designator

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RED HAT ENTERPRISE LINUX 8

AgendaNew Features in RHEL8

● Application Stream

● Web Console

● Image Builder

● Container Tools


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To deliver business advantages today,

organizations are shifting IT from

traditional infrastructure operations

and are focusing on service delivery.


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Build your future on a stable, high-performing

platform that can scale to meet the needs of

your organization today and tomorrow.

CONFIDENTIAL DesignatorRED HAT ENTERPRISE LINUX 8

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At a glance

KERNEL VERSION 4.18+

SYSTEM COMPILER GCC 8.2, LLVM 6.0

HARDWARE ARCHITECTURES

Intel/AMD 64-bit, IBM Power LE, IBM z Systems, ARM 64-bit

DEFAULT FILE SYSTEM XFS

PACKAGE MANAGEMENT Yum v4

TIME SYNCHRONIZATION Chrony

NETWORKING NetworkManager

Predictable updates


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6 monthsMinor updates

3 yearsMajor releases

2 phasesSupport life cycle

Application streams


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PostgreSQL 9.6 stream

Red Hat® Enterprise Linux® 8

PostgreSQL 10 stream

PostgreSQL 12 stream

Time of support

Red Hat Enterprise Linux 7

More choiceOffers versions of the open source tools and frameworks developers need

Newer versionsProvides access to newer versions as they stabilize

Simpler accessMaintains standard locations for tools and libraries

Create images for all your environments with image builder

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Single sourceLets you create gold images for any environment from the same blueprint increasing stability and consistency

Any footprintSupports public cloud, private cloud, enterprise hypervisors, and bare metal

Simple interfaceProvides web-based view within the web console for selecting packages and creating blueprints

Blueprint

Bare metal

Hypervisors

Public clouds

Private clouds


Optimized experiences for mission-critical databases

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● Red Hat Enterprise Linux is the reference platform for SQL Server on Linux

● Benchmark-breaking performance

● Fast deployment and portability via containers

● Red Hat Enterprise Linux is 1 of only 2 certified Linux distributions

● More than 20 years of Red Hat and SAP joint engineering collaboration

● Exceptional performance and scalability —the largest SAP install in the world runs on Red Hat Enterprise Linux


Hardware partner ecosystem

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OEMSSILICON IHVS


Red Hat Certified Cloud and Service Providers

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Application Streams

Simplified access to software


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Red Hat Enterprise Linux 7 repositories

server

optionalsupplementaryextras rhscl dotnet devtools

Red Hat Enterprise Linux 8 repositories

baseos

appstream supplementary codeready-builder

Graphical example of different ways an application stream could be managed

An Example Application Stream

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May 2019 ...

SoftwareA 9.6 stream

SoftwareA 10 stream

SoftwareB 7.2 stream

SoftwareB 7.3 stream

May 2020 May 2021 May 2022 May 2023 ...

The newest yum package manager: version 4

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New technologyMaintains the same experience while adding new tools

Better dependency managementOffers faster resolution and easier minimization of what's installed

Stable APIProvides new application programming interface (API) for extending yum that will progress into the future


Repository

rpm

rpm

rpm

rpm

rpm

rpm

metadata

rpm rpmrpm

system

yum

FREQUENTLY ASKED QUESTIONS

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No.Isn’t this just Software Collections?

FREQUENTLY ASKED QUESTIONS

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No.

In the example on the earlier slide, postgresql 9.6 and 10 were shown as simultaneously available versions. Can I have them both installed?

RULES OF ROAD

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Application stream rules of the road:

An application stream may offer multiple versions of a package, but only one may be installed on the system

Each application stream will have one version set as the default

Generally, you will want to use the module subcommand of yum when working with an application stream

Recommended practice: when changing to a different version of software in the application stream is to remove the installed version, then install the preferred version

Instructor Demonstration

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Listing available application streams:

# yum module list

Name Stream Profiles Summary

ruby 2.5 [d] common [d] An interpreter of object-oriented scripting language

The resulting output will contain all the available packages managed as application streams.


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Installing software from an application stream:

# yum module install ruby:2.5

...

Preparing :

Installing : ruby-libs-2.5.3-103.module+el8+2671+ebcc7ee0.x86_64

Installing : rubygem-bigdecimal-1.3.4-103.module+el8+2671+ebcc7ee0.x86_64

Installing : rubygem-psych-3.0.2-103.module+el8+2671+ebcc7ee0.x86_64

Installing : rubygem-json-2.1.0-103.module+el8+2671+ebcc7ee0.x86_64

...

DEMO TIME

https://lab.redhat.com/appstream-manage

Hands-on with Instructor

https://lab.redhat.com/appstream-manage


Web Console

What is the Web Console?

What is the Web Console?

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The Red Hat Enterprise Linux web console is a Red Hat Enterprise Linux 8 web-based interface designed for managing and monitoring your system.

● Managing services● Managing user accounts● Configuring network interfaces and firewall● Reviewing system logs● Managing virtual machines● Configuring SELinux● Updating software● Managing system subscriptions

Frequently Asked Questions

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Similar, but no.Is this webmin?


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Systems administrators or people with administrative responsibility for Red Hat Enterprise Linux systems.

Who is the Web Console systems administration tool for?


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No. Yes. Maybe? How you choose to manage your systems should be up to you.

I am an experienced systems administrator is this what Red Hat expects me to use to administer my system population?

Using Web Console

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Accessing the Web Console:In a supported browser, connect to the system’s port 9090

https://<your system>:9090

Using Web Console

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Available tools for Web Console:The top-level menu may be different depending on what additional plugins are installed. The picture on the right includes the packages:

● cockpit-dashboardProvides CPU, Memory, Network, and Disk consumption data

● cockpit-composerIncludes the Image Builder application for building virtual machine images

● cockpit-machinesVirtual machine management applications

● cockpit-storagedA plugin to allow an administrator to change/add storage configured for the system

● cockpit-podmanA module for adding container deployment functionality toWeb Console

Remote single-system views in the web console

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Browser-based interfaceOffers remotely accessible user interface using host security mechanisms

Consolidated viewProvides single view of tasks to speed understanding and completion

Standard management toolsUses system tools to change state, not a separate workflow


New in the web console

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Virtual machinesCreate and manage virtual machines

Network-bound disk encryptionEnroll disks with Tang server and manage LUKS keys

Single sign-on configurationAutomatically configure when joining a domain

DEMO TIME

https://lab.redhat.com/webconsole-software



Image Builder

Create images for all your environments with image builder

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Single sourceLets you create gold images for any environment from the same blueprint increasing stability and consistency

Any footprintSupports public cloud, private cloud, enterprise hypervisors, and bare metal

Simple interfaceProvides web-based view within the web console for selecting packages and creating blueprints

Blueprint

Bare metal

Hypervisors

Public clouds

Private clouds


DEMO TIME

https://lab.redhat.com/imagebuilder


https://lab.redhat.com/imagebuilder


Container Tools

Containers are Linux

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Namespaces

CPU Memory Storage Network

Cgroups

Seccomp

SELinuxRu

n

Build

CONTAINERSApplication dependencies

Application binaries


Red Hat Container Tools

Meet the container tools

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Deploy containersFamiliar syntax, compared to other container flavors

Create new container imagesUpdate/modify existing container images

Inspect, audit, and share container images

Why choose podman

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Why podman?● Open Container Initiative (OCI) compliant● Daemonless● Linux native technology stack● Rootless deployments● Compatible with other OCI compliant toolsets


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No. But if you really, really need a command called docker on your system, try installing the podman-docker package. (This isn’t actually docker, though)

Does RHEL8 ship Docker?


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Yes! We distribute the Red Hat Universal Base Image (UBI). This container image is supported by Red Hat when deployed on a supported Red Hat platform (RHEL/OpenShift).

Does Red Hat provide any supported container images?


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With the compatibility built into the Red Hat Container tools, you can use a combination of both. Red Hat has two seats on the Technical Oversight Board of the Open Container Initiative [a project of the Linux Foundation], which is a commitment to delivering tools that use open standards. Included as part of Red Hat Enterprise Linux, no additional subscriptions required.

Why should I use this instead of Docker?


Visit the Cataloghttps://catalog.redhat.com/software/

containers/explore

https://catalog.redhat.com/software/containers/explore

https://catalog.redhat.com/software/containers/explore


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Inspect available container images:

# podman images

REPOSITORY TAG IMAGE ID CREATED SIZE

registry.access.redhat.com/ubi8/ubi-init latest cda12d4c316c 6 weeks ago 255MB


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Deploy a container:Interactive, with a bash shell

# podman run -it ubi-init /bin/bash

Detached mode, with an exposed port

# podman run -dt -p 8080:80/tcp ubi-init

More options in the podman-run(1) manpage


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Viewing deployed containers:# podman ps -a

CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES

9df2431bf9b0 ...redhat.com/ubi8/ubi-init:latest /sbin/init 36 seconds Up 36 seconds romantic_feynman

Note: each container runtime is assigned a unique ID and NAME to use with other actions.


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Terminating detached containers:

Using stop with either a CONTAINER ID or NAME

# podman stop 9df2431bf9b0

or

# podman stop romantic_feynman


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Destroying container image overlays:

# podman rm 9df2431bf9b0

or

# podman rm romantic_feynman

More options in the podman-rm(1) manpage

DEMO TIME

https://lab.redhat.com/podman-deploy


https://lab.redhat.com/podman-deploy

DEMO TIME

https://lab.redhat.com/buildah


https://lab.redhat.com/buildah


Where can you start your Learning Journey?

linkedin.com/company/red-hat

youtube.com/user/RedHatVideos

facebook.com/redhatinc

twitter.com/RedHat

Red Hat is the world’s leading provider of

enterprise open source software solutions.

Award-winning support, training, and consulting

services make

Red Hat a trusted adviser to the Fortune 500.

Thank you

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enterprise linux fundamentals of red hat

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